All social networks have their jerks and trolls, and it’s a given that the larger a social network becomes, the more annoying users it will attract. Twitter’s operators have long valued openness over comfort, but issues with bullying, stalking, threats, offensive words and visuals have begun to drive some people away. CEO Dick Costolo admitted in a memo to his staff that “we suck at dealing with abuse”, and vowed to improve the network’s tools for dealing with aggressive losers.

At first glance, Betaworks’ new #Homescreen app appears to be a cumbersome approach to sharing your iPhone’s home screen. When you first fire it up after installing it, the app tells you to close it, …